| 摘要 |
PROBLEM TO BE SOLVED: To improve a fire fighting capacity of a sprinkling nozzle for fire fighting and to reduce a damage by the water. SOLUTION: The sprinkling nozzle for fire fighting of a stationary fire fighting facility is connected to the piping for fire fighting through which a fire extinguisher or water is sent by pressure and which sprays the fire extinguisher or water when a fire breaks, wherein a pulsating ejection mechanism to eject the fire extinguisher or water pulsatingly is disposed. The pulsating ejection mechanism comprises a hydraulic actuation mechanism which consists of an outer cylinder 21, an inner cylinder 22 as a valve plug which is accommodated in the outer cylinder with free vertical movement and has a water discharging aperture at a bottom part, a movable opening and closing ring member 44 to introduce the water pressure in the inner cylinder, and a pressure chamber 40A which is formed between the outer cylinder and the inner cylinder and pushes up the inner cylinder by the water pressure introduced through the movable opening and closing ring member. COPYRIGHT: (C)2005,JPO&NCIPI
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